quote:

use Number::Convert::Roman;

$c = Number::Convert::Roman->new;

print $c->arabic('IV'); # prints 4
print $c->roman(4); # prints IV

quote:

Originally posted by Pipe Smoker:
I can interpret Roman numerals easily. But I once had a computer programming exercise: write a program to convert any Arabic number to the equivalent Roman numeral, using the language FORTH.

I searched the web for “How to write Roman numerals”. I found lots of links, but every damned one of ‘em was an explanation of how to read ‘em rather than how to write ’em.

Here’s why I was interested in info about writing Roman numerals: consider the number 999. The conventional Roman numeral form would be CMXCIX. But I wondered if the ancient Romans might’ve used this shorter form for convenience in everyday commerce: IM. (1000 - 1)

In the end, I just gave up and wrote the program to produce the conventional Roman numeral form.

quote:

Originally posted by sigcrazy7:
I’m 11001100 years old. Is that easier than Roman Numerals? It’s certainly more useful.

quote:

Originally posted by sigcrazy7:
I’m 11001100 years old. Is that easier than Roman Numerals? It’s certainly more useful.

quote:

Originally posted by sigfreund:
According to the article I linked, the conventions for how the numerals were combined were not hard and fast in actual use.

“The subtractive notation (which uses IV instead of IIII) has become the standard notation only in modern times. ... Constructions such as IIIII for five, IIX for eight or VV for 10 have also been discovered. Subtractive notation arose from regular Latin usage: the number 18 was duodeviginti or ‘two from twenty’; the number 19 was undeviginti or ‘one from twenty’.”

quote:

Originally posted by Oz_Shadow:
If you really want to see confusion, show them an analog clock with Roman numerals.

quote:

Originally posted by MikeinNC:
I’m L years old, and I know them.

quote:

Originally posted by jhe888:
We learned them XLV years ago when I was in elementary school.